Sash-cord guide



(No Model.)

0. F.-DOEBLER. SASH 00111) GUIDE.

No. 591 034. Patented Oct. 5,1897,

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PATENT CHARLES F. DOEBLER, OF HARTFORD, CONNECTICUT.

SASH-CORD GUIDE.

SPECIFICATION forming part of Letters Patent No. 591 ,034, dated October 5, 1897. Applicationfiled January 30, 1897. Serial No. 621,284. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES F. DOEBLER, a citizen of the United States, residing at Hartford, in thecounty of Hartford and State of Connecticut, have invented certain new and useful Improvements in Frame-Pulleys, of which the following is a specification.

This invention relates to improvements in sash-cord guides or pulleys; and it has for its main object the provision of an improved device of this class, in which the cord or rope will be positively guided and held against slipping off from the upper side of the pulley after the parts are assembled in position.

Another object of the invention is to furnish as a part of the devicean improved pulley of simple construction, in which a divided resilient rim holds the web firmly in position upon the hub and exerts a compressing action upon the web to maintain all of the members of the pulley in their proper positions.

My improved pulley also embodies, in connection with a suitable rim, a pair of disks having the usual central openings surrounding the hub, and a hub having acentral portion of large diameter and two end portions of smaller diameter on which the disks are received and which are headed up at their ends to hold the disks in engagement with the ends or shoulders of the central portion of the hub and thus fasten the disks and the hub together. V

In the drawings accompanying and forming part of this specification, Figure 1 is a rear elevation of a sash-cord guide embodying my present invention. Fig. 2 is a side elevation of the same. Fig. 3 is a front elevation of the same. Fig. l is an elevation illustrating the blank from which the pulley-casing is formed. Fig. 5 is a side elevation of my improved pulley. Fig. 6 is a crosssection of the same, the section being taken in line a a,

Fig. 5. Fig. -7 is an elevation illustrating the blank from which the pulley-rim is formed. Fig. 8 is a transverse section of the same, and Fig. 9 is a side elevation of an unfinished pulley having a portion of a disk broken away and illustrating the manner in which thedivided rim of the pulley is sprung into position in assembling the parts and before the side flanges thereof are turned down around the disks that constitute the web.

Similar characters designate like parts in all the figures of the drawings.

The form of pulley or sash-cord guide that I have illustrated in the drawings in my present application comprises as its principal features a face-plate adapted to be secured to the jainb of a window-frame or to any other suitable member, a pulley-casing, and a pulley mounted in the casing.

'The face-plate is designated herein by F and has the usual screw-holes for screwing the sash-cord guide to a suitable frame-piece and also has a pulley-opening between the ends thereof, this pulley-opening being inclicated at 2. The casing is intended in this case to be formed in a single piece from sheet metal, which after being stamped out will be bent at proper points, along lines that will be hereinafter referred to, to form the finished casing. This casing is designated in a general way by C and comprises as its essential elements a pair of side walls and connecting portions or strips joining said side walls, these side walls having their ends bent to form a substantially oblong-shaped casing with rounded ends when viewed from the front, and the side walls themselves having inwardly-projecting rounded portions or bosses near the upper ends thereof and in position to form guides which will keep the rope or sash-cord from slipping off from the pulley when the several parts of the device are assembled. I

For the purpose of properly positioning the pulley and preventing axial movement of the same the two sidewalls 3 and 3'. of the casing member are preferably struck up, as shown at 4 and 4, to form cheeks disposed within the main portions 3 and 3 of the side walls, these cheeks being perforated at 5 and 5 (see Fig. 4) to receive the pulley pin or spindle.

The blank from which the casing isformed is represented in Fig. 4 and has a central pul ley-opening 6, at the opposite sides of which are two side pieces 7 and 7 these side pieces being connected by strips 8 and 9, which are perforated at 8 and 9, respectively, for securing the casing to the face-plate F, as by means of rivets. The ends of the two side pieces extend considerably beyond the connecting portions 8 and 9, so as to permit these ends to be bent over to form the rounded ends of the sub stantially oblong casing when the blank is bent up into shape. The checks of the side walls are struck up along the lines 10 and 10 before the blank is shaped into a casin g, and, moreover, the rope-guides or cord-guides, which are indicated at 12 and 12, are formed in the blank before the casing is shaped therefrom by being bent inwardly substantially along the lines 13 and 13. Hence it will be evident that the blank for the casing may be properly stamped out and sold in the form shown in Fig. 4, and that in order to assemble the parts it will only be necessary to bend the blank along the lines 14 14 and 15 15 to bring the side walls 7 and 7 into parallelism and then bend the ends of the side pieces until the corresponding ends of opposite pieces meet, as shown in Fig. 3, and afterward secure the casing to the face-plate F by means of suitable rivets, such as l 6. It will be noticed that the lines 14: 14 and 15 15 are continuations of the straight edges of the side pieces 7 and 7, lying at the sides of the pulley-opening 6, and hence that these straight edges 17 and 17 will be in contact with the face-plate when the casin g and face-plate are connected and will prevent twisting of the casin g relatively to the face-plate after the parts are riveted together.

In order that the side pieces 7 and 7 may be bent readily along the lines 14E 14 and 15 15, I prefer to provide cuts, such as 18, at the intersection of the side edges 17 17 with the inner edges of the connecting members 8 and 9, thus leaving only very narrow connecting portions to be bent when the side walls of the casing are brought into parallelism with each other. It will be noticed that in Fig. 2 the upper edges of the side pieces 7 and 7 and the upper edge of the connecting-strip 8 are in alinement when the casing is finished and that the lower edges of these side pieces and the lower edges of the strip 9 are also in alinement and parallel with the upper edges of these parts. It will be obvious that with the parts organized in this manner excessive mortising of the window-jamb will be unnecessary, as the connecting-strips will take up no more room than the side walls of the casing.

The rope-guides 12 and 12 are, as before stated, formed in the present case by struckup portions of the side walls of the casing G, and will preferably have rounded faces, so as to prevent cutting or tearing of the rope or cord that passes around the pulley, and, moreover, these guides are so placed as to be in juxtaposition with the upper edges of the pulley-rim, and will thus prevent the cord from slipping off the rim, in the event of which the rope would be caught between the sides of the pulley and the inner faces of the side walls of the casing and would be wedged there if the guides were not employed.

By reference to Fig. 3 it will be seen that the guides come almost to the flanges of the rim of the pulley and form substantially continuations of the pulley-rim. Moreover the guides are, as will be obvious, placed at the points where the rope is most likely to slip off from the rim of the pulley.

The pulley that I prefer to employ is shown herein at P and is mounted within the casing O on a pulley pin or spindle 20, passing through the hub of the pulley and headed up at its ends at opposite sides of the casing. As before stated, this pulley comprises as its essential elements a hub, a web formed, preferably, by a pair of disks secured to the hub, and a rim encircling the disks and exerting a compressing action upon the latter to hold the parts together. The disks are designated by 21, and each has a central opening of the same size and contour as that portion of the hub upon which it is to be secured. The main portion of each of these disks inclines inward from the central opening thereof and has an outwardly-sloping rim portion or felly preferably of such shape that the two rim portions of the two disks form between them a substantially semicircular felly adapted to receive and be engaged by the pulley-rim.

The hub of the pulley is designated by 22, and has a central portion 22 of large diameter and two end portions of smallerdiameter, just large enough to receive the disks 21, the central portion 22 of the hub being of such diameter as toform at its ends walls against which the disks are stopped. If now the reduced ends of the hub are headed up, as shown in Figs. 5, 6, and 9, flanged portions 22" will be formed that will clutch the outer sides of the disks aforesaid and will hold the disks firmly between the flanges 22" and the stop-walls at the ends of the central portion 22 of the hub. This construction of the hub permits the assembling of the hub and the web of the pulley by means of a hub member constructed in one piece, thus rendering unnecessary the employment of additional parts for holding and locking the several elements of the pulley.

The rim that I prefer to employ for my improved hub is designated herein by 25, the blank therefor being shown in Figs. 7 and 8. This rim when it is put on the web is substantially U-shaped in cross-section and has two laterally extending straight annular flanges, which are designated by 25. This rim will usually be made of thin sheet-steel and will be shaped to circular form before it is put on the pulley-web, and the rim when in its normal position will by its own resilience hold the divided portions of said web in contact with each other. When the rim is to be applied to the pulley, the divided ends thereof are sprung apart, and the rim is then slipped over the felly portions of the disks, as shown in Fig. 9. When the rim is on the pulley, it will engage the felly portions of the disk and will exert a compressing action thereon, thereby binding itself firmly on the disks. As soon as the divided ends of the pulley-rim are brought together the straight annular flanges 25 thereof will be turned down over the edges of the felly portions of the disks, as

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shown in Figs. 5 and 6, thus securing the parts tightly together to form the completed pulley. The pulley now being finished the casing will be attached to the face-plate F of the device, and the pin 20 will be passed through the journal-opening in the hub of the wheel after the latter has been placed between the sides of the casing O, and the rim will then be headed up to hold the pulley in its Working position with the flanges of the rim thereof in juxtaposition with the rope-guides 12 and 12.

, It will be apparent from the foregoing description that my improved frame-pulley or sash-cord comprises a plurality of members each one of which is of extremely simple construction and all of which are so organized that the several parts of the device cooperate to hold and retain the cord in its proper position and to withstand a Very great strain in proportion to their size and weight.

Having described my invention, I claim 1. The combination, with a pulley, of a sheet-metal casing supporting the same and having inwardly projecting convex ropeguides struck up from the plane of the sides of the casing near the upper side of the pulley and in juxtaposition With the pulley-rim and in position to prevent slipping off the rope off from the pulley.

2. A pulley comprising a hub, acircular web, and adivided resilientcompressing-rim adapted to be sprung over the web and having annular holding-flanges at its sides for engaging said web.

3. A pulley comprising a pair of disks having central openings of the same diameters as the corresponding small diameters of the hub; a hub having a central portion of large diameter and end portions of smaller diameter adapted to receive said disks and to be headed up to hold said disks in engagement with the ends of the central portion of the hub; and a rim encircling said disks.

4. A blank having a pulley-opening and a pair of side pieces at opposite sides, respectively, of said opening and adapted to form the side walls of the casing, said side pieces having rounded rope-guides struck up therefrom near the upper ends thereof.

5. The combination,with a face-plate, of a pulley-casing having side wallsprovided With struck-up,inwardly-projecting rounded ropeguiding bosses and also having connectingstrips joining said side walls and secured to the face-plate, said connecting-strips having their outer edges within the upper and lower edges of the side walls; and a pulley mounted between said side walls.

CHARLES F. DOEELER. 

